Lesson Plan | Active Learning | Lamarckism and Darwinism

Assumptions: This Active Lesson Plan assumes: a 100-minute class, prior student study with both the Book and the start of Project development, and that only one activity (among the three suggested) will be chosen to be conducted during the class, as each activity is designed to take up a significant portion of the available time.

Objectives

Duration: (5 - 10 minutes)

This stage aims to centrally prepare students for an in-depth discussion and critical analysis of the theories of Lamarck and Darwin. By clearly defining objectives, students can focus their studies and contributions in class on key areas, ensuring a more robust and comprehensive understanding of evolutionary theories and their implications. This facilitates targeted and effective learning during the subsequent practical activities.

Main Objectives:

1. Understand and differentiate the evolutionary theories of Lamarck (Lamarckism) and Darwin (Darwinism), focusing especially on natural selection and the law of use and disuse.

2. Analyze examples and evidence that support each theory, promoting a critical understanding of how these ideas influenced the understanding of biological evolution.

Side Objectives:

Introduction

Duration: (15 - 20 minutes)

This stage of the lesson plan is designed to engage students with problem situations that prompt them to reflect on the prior study of evolutionary theories, stimulating the application of these concepts in new and challenging contexts. The contextualization serves to connect theoretical concepts with the real world, increasing students' interest and the relevance of the subject, promoting a deeper understanding of the practical and historical implications of the theories of Lamarck and Darwin.

Problem-Based Situations

1. Imagine a group of giraffes is isolated in an area where the trees are very tall. How would the theories of Lamarck and Darwin explain the changes in the subsequent generations of these giraffes to adapt to this new environment?

2. Consider a population of bacteria exposed to an antibiotic. Lamarck and Darwin would have different views on how these bacteria could develop resistance over time. How would each theorist explain this phenomenon?

Contextualization

When exploring Lamarckism and Darwinism, it is crucial to understand how these theories apply not only in historical examples but also in contemporary situations, such as antibiotic resistance. This phenomenon is a powerful example of natural selection in action, where the fittest microorganisms survive and pass their resistant genes to the next generation. Curiosities, such as the initial history of giraffes perceived by Lamarck and Darwin's voyage on the Beagle, contextualize these theories in time and show their evolution to modern concepts of genetics and evolutionary biology.

Development

Duration: (75 - 80 minutes)

This stage of the lesson plan is designed to allow students to apply the concepts of evolution from Lamarck and Darwin in simulated scenarios, promoting a deeper understanding through practical and playful activities. The use of simulations and games facilitates the visualization and comprehension of evolutionary processes, stimulating critical thinking and comparative analysis of the studied theories.

Activity Suggestions

It is recommended to carry out only one of the suggested activities

Activity 1 - Evolution in Action: The Great Giraffe Race

> Duration: (60 - 70 minutes)

- Objective: Understand natural selection and the law of use and disuse in practice, relating to the theoretical concepts studied previously.

- Description: In this activity, students will be divided into groups to simulate an environment where giraffes need to reach increasingly taller leaves. Each group will represent a generation of giraffes, and they will have to 'evolve' to reach the resources available in cardboard trees, with leaves placed at different heights.

- Instructions:

• Divide the class into groups of up to 5 students.

• Each group receives a cardboard 'giraffe' that can be modified (longer neck, taller legs, etc.).

• Paper leaves placed at varying heights represent the resources. In each round, the leaves are placed higher.

• Groups must decide how to 'evolve' their giraffes in each generation (round) to reach the tallest leaves.

• After each round, discuss each group's strategies and how it relates to the theories of Lamarck and Darwin.

Activity 2 - Survival of the Fittest: Bacteria in Battle

> Duration: (60 - 70 minutes)

- Objective: Explore concepts of antibiotic resistance and adaptation, comparing the explanations of Lamarck and Darwin.

- Description: Students will use models of bacteria made from modeling clay to simulate a scenario of exposure to different concentrations of antibiotics. The goal is to observe how different adaptation strategies can result in greater survival of bacteria, illustrating the differences between the theories of Lamarck and Darwin.

- Instructions:

• Form groups of up to 5 students and provide modeling clay and simulated petri dishes.

• Each group creates bacteria of different colors, each color representing a distinct genetic characteristic.

• Introduce 'antibiotics' in the form of colored sprays, each color representing a different potency.

• Students decide how their bacteria 'evolve' after each round of exposure to antibiotics.

• Discuss how each group adapted their bacteria and relate it to evolutionary theories.

Activity 3 - The Evolutionary Adventure: The Game

> Duration: (60 - 70 minutes)

- Objective: Facilitate understanding of evolutionary theories through a game that exemplifies natural events and processes.

- Description: A board game where students, in groups, must help different species evolve and survive environmental challenges. The board contains squares that represent evolutionary events and challenges, and students must use 'mutation' and 'selection' cards to advance.

- Instructions:

• Organize students into groups of up to 5 people.

• Provide each group with a board and event cards (mutations, natural selection, etc.).

• Groups roll the dice and advance on the board, facing the challenges proposed on the squares they land on.

• Use the cards to resolve challenges, deciding how species evolve or are eliminated.

• At the end, discuss how the decisions made relate to the theories of Lamarck and Darwin.

Feedback

Duration: (15 - 20 minutes)

The purpose of this stage is to consolidate learning through reflection and sharing of experiences among students. Discussing in groups allows students to articulate their understanding and hear different perspectives, enriching their understanding of the topic. This stage also serves to verify students' understanding of the theories of Lamarck and Darwin, ensuring that they can clearly differentiate between these two evolutionary theories.

Group Discussion

After conducting the practical activities, promote a group discussion with all students to share their experiences and conclusions. Start the discussion with a brief introduction about the importance of connecting theory to practice and how each activity helped illustrate the concepts of Lamarck and Darwin. Encourage each group to explain the strategies they used and what they learned about the evolution of giraffes and bacteria, as well as the application of the board game in understanding evolutionary processes.

Key Questions

1. How did the practical activities help understand the differences between Lamarckism and Darwinism?

2. What examples of use and disuse were you able to identify in the activities performed?

3. How was natural selection represented in the simulations and games you participated in?

Conclusion

Duration: (5 - 10 minutes)

The purpose of this stage is to ensure that all key concepts are consolidated and that students understand how the discussed theories apply to the real world. Additionally, it serves to reinforce the relevance of evolutionary theory in practical and everyday issues, preparing students to apply this knowledge in future studies or practical situations.

Summary

In this final stage, the teacher should summarize the main concepts discussed about Lamarckism and Darwinism, highlighting natural selection, the law of use and disuse, and how these theories apply to practical and contemporary examples. The review should include the fundamental differences between Lamarck's and Darwin's approaches to evolutionary changes, using examples from the activities such as giraffes and bacteria to illustrate key points.

Theory Connection

Explain how the practical activities integrated theory with practice, allowing students to visualize and experience the application of theoretical concepts in simulated scenarios. Highlight how this teaching method helps reinforce students' understanding by connecting abstract concepts with tangible and interactive applications.

Closing

Conclude by emphasizing the importance of studying evolution and the theories of Lamarck and Darwin for understanding biodiversity and species adaptation. Relate these concepts to practical issues such as antibiotic resistance and environmental adaptations, showing how evolution continues to impact our current world.